20612220550 has 24 divisors (see below), whose sum is σ = 38424159000. Its totient is φ = 8226516480.

The previous prime is 20612220533. The next prime is 20612220631. The reversal of 20612220550 is 5502221602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 436620 + ... + 481519.

It is an arithmetic number, because the mean of its divisors is an integer number (1601006625).

Almost surely, 2^20612220550 is an apocalyptic number.

20612220550 is a deficient number, since it is larger than the sum of its proper divisors (17811938450).

20612220550 is a wasteful number, since it uses less digits than its factorization.

20612220550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918600 (or 918595 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20612220550 in words is "twenty billion, six hundred twelve million, two hundred twenty thousand, five hundred fifty".